Article
Chemistry, Multidisciplinary
Ruina Liu, Youwei Lin, Xiaodong Ye, Jinzhao Hu, Gongdi Xu, Yongfeng Li
Summary: The novel anaerobic maifanite-immobilized sludge reactor (AMSR) showed more efficient and stable performance in hydrogen production compared to the control reactor. The highest hydrogen production rate of 11.2 +/- 0.4 mmol L-1 h(-1) was achieved at an optimum OLR of 72 g COD L-1 d(-1) in the AMSR.
Article
Environmental Sciences
Vianka Celina Hernandez-Fydrych, Maria del Carmen Fajardoz-Ortiz, Monica Liliana Salazar-Pelaez
Summary: This study analyzed the performance of a hybrid upflow anaerobic sludge blanket (HUASB) reactor packed with natural zeolite for slaughterhouse wastewater treatment through kinetics modeling. The results showed that the use of a zeolite filter improved the removal efficiency of COD, solids, and nitrogen and phosphorus compounds in the modified HUASB reactor.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Mohini Verma, Shubhrasekhar Chakraborty, Shweta Kumari, Aalok Gupta, Dewanshu Kumar, Jawed Iqbal, J. Rajesh Banu, Arulazhagan Pugazhendi, R. Naresh Kumar
Summary: A laboratory-scale GAC-SBR was used to co-treat landfill leachate and municipal wastewater, and the treatment efficiency was evaluated. Increasing GAC concentration led to better removal of COD and ammonia from leachate. GAC-SBR demonstrated efficient removal of COD and nutrients at a 10-day HRT. Statistically significant differences were observed in the treatments for different leachate:wastewater ratios. Coupled treatment showed potential for co-treatment, but additional physico-chemical processes may be required for further pollutant removal.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Chemical
Ch. Tahir Mehmood, Weiyu Tan, Yuzhen Chen, Hira Waheed, Yiwei Li, Yeyuan Xiao, Ziyi Zhong
Summary: This study investigated the synergetic effects of UV and O-3 in treating real textile wastewater using a ceramic membrane reactor coupled with an up-flow anaerobic sludge blanket reactor. The results showed that intermittent UV exposure and ozonation significantly improved membrane fouling control and color removal compared to standalone applications of UV or ozone.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Chandan Mahata, Suman Dhar, Subhabrata Ray, Debabrata Das
Summary: The performance of the upflow anaerobic sludge blanket (UASB) reactor for stable H2 production from starchy wastewater supplemented with groundnut de-oiled cake using mixed consortia was investigated in this study. Limited research on H2 production for UASB reactor has been reported. The operation of the UASB reactor was divided into start-up period and production period, with different hydraulic retention times (HRT) examined for H2 production. The maximum H2 production rate of 12.3 L L-1 d-1 was observed at 3 h HRT. Physicochemical characteristics of the granular sludge were studied, and advanced bio-kinetic models were implemented to analyze the substrate consumption on hydrogen production.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Environmental Sciences
Yuqi Wang, Mengrui Jie, Huining Zhang, Jia Yang, Meijuan Xu
Summary: This study investigated the use of an UASB reactor for efficient removal of nitrate from high sulfate and nitrate concentration industrial wastewater. The results showed a nitrate removal efficiency exceeding 96.0% in wastewater with a high sulfate concentration of 10 g/L. Autotrophic denitrifying bacteria such as Raoultella and Shinella, as well as heterotrophic denitrifying bacteria including Klebsiella, Simplicispira, and Thauera, were found to play important roles in the denitrification process.
Article
Engineering, Environmental
Yasuyuki Takemura, Masataka Aoki, Tsuyoshi Danshita, Akinori Iguchi, Shoji Ikeda, Yuma Miyaoka, Haruhiko Sumino, Kazuaki Syutsubo
Summary: In this study, an up-flow anaerobic sludge blanket (UASB) reactor was operated under psychrophilic conditions to investigate the effects of sulfate on the microbial characteristics of MEA-containing wastewater treatment. It was found that despite the increase in MEA and sulfate, the COD removal efficiency remained above 95%. However, the disintegration of granular sludge was observed when the sulfate concentration increased. Batch tests showed that propionate and acetate were produced as metabolites of MEA degradation. Sulfate acclimation led to a decrease in methane-producing activities and an increase in sulfate-reducing activities.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Energy & Fuels
Behzad Kamyab, Hamid Zilouei
Summary: The experiment used a mixed-UASB reactor to treat baker's yeast wastewater, showing that an increase in inlet wastewater concentration led to higher removal of organic compounds, but lower methane production efficiency. Chemical oxygen demand efficiency ranged from 9.05% to 35.98% at concentrations of 1.55 to 4.1 mg COD cm(-3). At the end of 40 days, the volume of biogas obtained from the wastewater was 113.4 L.
Article
Engineering, Environmental
Itzel Romero-Soto, Celestino Garcia-Gomez, Luis Leyva-Soto, Juan Napoles-Armenta, Maria Concha-Guzman, Lourdes Diaz-Tenorio, Ruth Ulloa-Mercado, Patrick Drogui, Gerardo Buelna, Ana Maria Renteria-Mexia, Pablo Gortares-Moroyoqui
Summary: This study successfully evaluated a coupled bio-electrochemical system for reducing chloramphenicol and chemical oxygen demand in swine wastewater. The coupled system achieved high COD and CAP removal rates, demonstrating its potential application in removing antibiotics and organic pollutants in various types of wastewaters.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
I. A. Hernandez-Rodriguez, J. Lopez-Ortega, G. Gonzalez-Blanco, R. Beristain-Cardoso
Summary: A lab-scale UASB reactor was used to simulate and evaluate synthetic and complex industrial wastewater treatment. The control of temperature and consideration of biogas bubbles in the hydrodynamics significantly impacted COD removal efficiency and methane production.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jingwen Zhang, Yongzhen Peng, Xiangchen Li, Rui Du
Summary: This study proposed and demonstrated a novel approach integrating partial-denitrification with anaerobic ammonia oxidation for efficient biological nitrogen removal from high-strength pharmaceutical wastewater. The PD/A biofilm showed high tolerance and adaptation to pharmaceutical wastewater, achieving a stable TN removal efficiency. High-throughput sequencing analysis revealed important bacterial communities contributing to high NO2- -N accumulation in the system. Overall, this new method offers a satisfactory efficiency for high-strength pharmaceutical wastewater treatment with low energy consumption and operation cost.
Article
Environmental Sciences
Jaime Diaz-Gomez, Andrea Perez-Vidal, David Vargas-Nuncira, Olga Usaquen-Perilla, Ximena Jimenez-Daza, Claudia Rodriguez
Summary: UASB reactors are a viable option for sewage treatment, but post-treatment is necessary to improve effluent quality. This study established a start-up methodology for a full-scale anaerobic-aerobic system and evaluated removal efficiencies at each step. It was found that anaerobic effluent can deteriorate sludge in the aerobic tank, highlighting the importance of operational aspects.
Article
Chemistry, Physical
Guanchao Li, Qing Teng, Beilei Sun, Zhichao Yang, Shengyu Liu, Xuan Zhu
Summary: The Ag-TiO2-FAMB photocatalyst was successfully prepared by the sol-gel method to improve its photocatalytic performance and recovery rate, with superoxide radicals identified as the main active species for the degradation of xanthate into CO2, SO42-, H2O.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Environmental
M. Esparza-Soto, S. Alcaraz-Ibarra, M. Lucero-Chavez, M. Mier-Quiroga, C. Fall
Summary: This study investigates the effect of low operating temperature on biomass yield during anaerobic treatment of chocolate confectionery wastewater. The results show that lower operating temperature leads to higher biomass yield but also results in biomass washout.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Rafaela S. Fontenele, Simona Kraberger, James Hadfield, Erin M. Driver, Devin Bowes, LaRinda A. Holland, Temitope O. C. Faleye, Sangeet Adhikari, Rahul Kumar, Rosa Inchausti, Wydale K. Holmes, Stephanie Deitrick, Philip Brown, Darrell Duty, Ted Smith, Aruni Bhatnagar, Ray A. Yeager, Rochelle H. Holm, Natalia Hoogesteijn von Reitzenstein, Elliott Wheeler, Kevin Dixon, Tim Constantine, Melissa A. Wilson, Efrem S. Lim, Xiaofang Jiang, Rolf U. Halden, Matthew Scotch, Arvind Varsani
Summary: The study analyzed 91 wastewater samples from 11 states in the USA, detecting a large number of new single-nucleotide variants of SARS-CoV-2, with half of them also being found in subsequent clinical data. The presence of more lineages in wastewater samples suggests a greater genetic diversity circulating within communities compared to clinical-derived data.
